Chapter 28 – Stars and Galaxies
... There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
... There are millions of light years between galaxies Sun belongs to the Milky Way Galaxy which is a spiral galaxy Milky Way belongs to the Local Group of about 30 galaxies ...
Chapter 19 Notes Stars Stars are bright balls of gas that are trillions
... ii. Stars near the Earth seem to move, while stars that are more distant stars seem to stay in one place as the Earth revolves around the sun. j. During each season, the Earth faces a different part of the sky at night. This is why we see different constellations at different times of the year. i. A ...
... ii. Stars near the Earth seem to move, while stars that are more distant stars seem to stay in one place as the Earth revolves around the sun. j. During each season, the Earth faces a different part of the sky at night. This is why we see different constellations at different times of the year. i. A ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
... 1. Why are Cepheid variable stars important in our study of the Milky Way galaxy? By monitoring a Cepheid star its distance from us can be calculated. Since we assume that nearly all the stars in a cluster are nearly the same age, we can determine the cluster’s age and distance ad some range of the ...
Astrophysics
... closer together millions of years ago. If Hubble’s graph is used, the origin of this movement = approx. 10 000 million years old ...
... closer together millions of years ago. If Hubble’s graph is used, the origin of this movement = approx. 10 000 million years old ...
Nebulas & Stars
... is PKS-2349 which is only about 1500 million light years away from Earth Quasars can live for a very long time scientists say that quasars that were discovered around 35 ...
... is PKS-2349 which is only about 1500 million light years away from Earth Quasars can live for a very long time scientists say that quasars that were discovered around 35 ...
Chapter 2 Basic Chemistry
... releasing it – When fusion requires more energy than it can produce, there is no longer any outward pressure to balance the gravitational force – The core collapses because of its own gravity and then rebounds with a shock wave that violently blow’s the star’s outer layers away from the core – The r ...
... releasing it – When fusion requires more energy than it can produce, there is no longer any outward pressure to balance the gravitational force – The core collapses because of its own gravity and then rebounds with a shock wave that violently blow’s the star’s outer layers away from the core – The r ...
Highlights of the Poster Session - Indico
... Gamma-ray bursts (GRBs) are probably the most luminous events in the universe since the Big Bang. They are flashes of gamma rays coming from seemingly random places in deep space at random times. GRBs last from milliseconds to minutes, often followed by an afterglow emission at longer wavelengths (X ...
... Gamma-ray bursts (GRBs) are probably the most luminous events in the universe since the Big Bang. They are flashes of gamma rays coming from seemingly random places in deep space at random times. GRBs last from milliseconds to minutes, often followed by an afterglow emission at longer wavelengths (X ...
Galaxies - Wallkill Valley Regional High School
... - A spherical “halo” of stars, including many in globular clusters - A super-massive black hole at the center of the central bulge ...
... - A spherical “halo” of stars, including many in globular clusters - A super-massive black hole at the center of the central bulge ...
September 3 and 5 slides
... reasons: (1) measurements of proper motions in M101 (Adrian von Maanen) lead to ludicrous rotation speeds if M101 were as big as the Milky Way; (2) comparison of brightness of SAndromedae in M31 with Nova Persei in the Milky Way ...
... reasons: (1) measurements of proper motions in M101 (Adrian von Maanen) lead to ludicrous rotation speeds if M101 were as big as the Milky Way; (2) comparison of brightness of SAndromedae in M31 with Nova Persei in the Milky Way ...
The Milky Way - National Tsing Hua University
... Pulsars are emitting winds and jets of highly energetic particles. ...
... Pulsars are emitting winds and jets of highly energetic particles. ...
Chapter 25 Beyond Our Solar System
... • White dwarfs are the remains of low-mass and medium-mass stars. • Neutron stars, which are smaller and more massive than white dwarfs, are thought to be the remnants of supernova events. • A spinning neutron star that appears to give off pulses of radio waves is called a pulsar. • Dense objects wi ...
... • White dwarfs are the remains of low-mass and medium-mass stars. • Neutron stars, which are smaller and more massive than white dwarfs, are thought to be the remnants of supernova events. • A spinning neutron star that appears to give off pulses of radio waves is called a pulsar. • Dense objects wi ...
Friday, January 27, 2017 First exam a week from today. Review
... Some suggested an alien structure. Bunk (no heat signal), but still not well explained with serious science. ...
... Some suggested an alien structure. Bunk (no heat signal), but still not well explained with serious science. ...
PowerPoint Presentation - Super Massive Black Holes
... a stellar-looking object was found (it looked like a point of like --- like a star does). These objects were called the "qausi-stellar radio sources", or "quasars" for short. Later, it was found these sources could not be stars in our galaxy, but must be very far away --as far as any of the distant ...
... a stellar-looking object was found (it looked like a point of like --- like a star does). These objects were called the "qausi-stellar radio sources", or "quasars" for short. Later, it was found these sources could not be stars in our galaxy, but must be very far away --as far as any of the distant ...
Slide 1
... A light year is the distance light travels in one year. One light year = six trillion miles. ...
... A light year is the distance light travels in one year. One light year = six trillion miles. ...
Active Galactic Nuclei - University of Toronto
... • Radio output not seen in the visible spectrum – When viewed in the radio spectrum, can see one or two jets emerging ...
... • Radio output not seen in the visible spectrum – When viewed in the radio spectrum, can see one or two jets emerging ...
Supernova - Mid-Pacific Institute
... A supernova is an explosion of a massive supergiant star. Occurs at the end of a stars lifetime when its nuclear fuel is exhausted and is no longer supported by the release of nuclear energy. The enrichment of the gas in our region of the milky way reached such a point that a sufficient quanti ...
... A supernova is an explosion of a massive supergiant star. Occurs at the end of a stars lifetime when its nuclear fuel is exhausted and is no longer supported by the release of nuclear energy. The enrichment of the gas in our region of the milky way reached such a point that a sufficient quanti ...
BlackHoleintheCenter..
... Black Hole in the Center of the Galaxy Compelling Evidence These stars are spiraling around the black hole at speeds of up to three million miles per hour-about 10 times the speed at which stars typically move. In order to account for the rapid speeds of these stars, Ghez determined that an object ...
... Black Hole in the Center of the Galaxy Compelling Evidence These stars are spiraling around the black hole at speeds of up to three million miles per hour-about 10 times the speed at which stars typically move. In order to account for the rapid speeds of these stars, Ghez determined that an object ...
Study Guide: Unit 1, The Universe and its Stars, HS
... 12) HS-ESS1-1 The name applied to concentrations of interstellar matter that glow when it is close to very hot stars is ________. A) granules B) prominences C) nebulas D) quasars E) plages 13) HS-ESS1-1 As _____________ shrinks, gravitational energy is converted into energy of motion, or heat energy ...
... 12) HS-ESS1-1 The name applied to concentrations of interstellar matter that glow when it is close to very hot stars is ________. A) granules B) prominences C) nebulas D) quasars E) plages 13) HS-ESS1-1 As _____________ shrinks, gravitational energy is converted into energy of motion, or heat energy ...
Exam 3 Study Guide
... What are three properties that distinguish elliptical galaxies from spiral galaxies? How do spiral galaxies form? How do elliptical galaxies form? Where in a spiral galaxy might you find star forming regions? Where in an elliptical galaxy might you find star forming regions (hint: trick question!)? ...
... What are three properties that distinguish elliptical galaxies from spiral galaxies? How do spiral galaxies form? How do elliptical galaxies form? Where in a spiral galaxy might you find star forming regions? Where in an elliptical galaxy might you find star forming regions (hint: trick question!)? ...
Integrative Studies 410 Our Place in the Universe
... • Conclusion: there are no stars beyond a certain distance ...
... • Conclusion: there are no stars beyond a certain distance ...
review
... that they are caused by spiral density waves that travel outward from the center. Where the density is higher, stars form rather quickly and give the light we see as the spiral arms. Near the galaxy center there is a bright region that emits strongly also in radio and X-ray: ‘Sagitarius A’. We belie ...
... that they are caused by spiral density waves that travel outward from the center. Where the density is higher, stars form rather quickly and give the light we see as the spiral arms. Near the galaxy center there is a bright region that emits strongly also in radio and X-ray: ‘Sagitarius A’. We belie ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.